again, last january, he disrupted a sermon about martin luther king, calling the civil rights leader a nonbeliever. the revelations and charges just as this city is struggling to recover a moment of silence marking one week since the attack from the oval office and around the country. a solemn tribute. >> -- in boston, almost every spot in this city is silent and still. >> reporter: another step toward normal, boylston street turned over by federal investigators to the city of boston. in a sign of the investigation's intensity, a tree, possibly touched by dzhokhar removed, taken as evidence, and photos of dzhokhar withdrawing money from an atm after a carjacking and the murder of m.i.t. police officer sean collier. this, as the victims continue to heal. 50 in the hospital. two still critical. for some seriously injured, hope. >> nearly all of the patients that have lost legs are already walking the halls with physical therapists. >> reporter: still, grim reminders here, just about everywhere. in medford the funeral for 29-year-old krystle campbell. the church overflowing, the grief u